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Basic Investigations on the New Acceleration Scheme with Large Amplitude Electron Plasma Waves

Research Project

Project/Area Number 62460216
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field プラズマ理工学
Research InstitutionUtsunomiya University

Principal Investigator

NISHIDA Yasushi  Faculty of Engineering, Utsunomiya University, 工学部, 教授 (00005315)

Co-Investigator(Kenkyū-buntansha) NAGASAWA Takeshi  General Arts, Ashikaga Institute of Technology, 共通, 講師 (10118440)
HONZAWA Tadao  Faculty of Engineering, Utsunomiya University, 工学部, 教授 (20023707)
Project Period (FY) 1987 – 1988
Project Status Completed (Fiscal Year 1988)
Budget Amount *help
¥7,500,000 (Direct Cost: ¥7,500,000)
Fiscal Year 1988: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1987: ¥6,300,000 (Direct Cost: ¥6,300,000)
KeywordsElectron plasma wave / Resonance absorption / VpxB acceleration / Electron beam / Linear accelerator / Beam-plasma interaction / 共鳴吸収 / Vp×B加速法 / 波と粒子の相互作用 / 直交場加速器 / 線型加速器 / マイクロ波プラズマ相互作用 / 遅波回路 / Vp×B加速器
Research Abstract

Large amplitude electron plasma waves are excited, when a high power microwave is irradiated to the nonuniform plasma with a static magnetic field. In this scheme, it is aimed to investigate the interactions between an electron beam and electron plasma waves under the effects of VpxB acceleration mechanism. In the fiscal year of 1987, we devoted to the design and construction of new system of experimental apparatus, and in that of 1988, we have performed the experimental investigations. For this purpose, we have made an electron-beam gun with a small size (diameter:3 cm, maximum acceleration voltage:500V, maximum beam current:300mA), which is settled in the overdense region for a resonance absorption of the electromagnetic wave. In the present stage, we have almost finished the experimental work for the first phase, and several new phenomena have been clarified.
1. When there is no magnetic field (B=0), precise investigations revealed that the interactions between electron plasma waves and an electron beam occured resonantly at Vp Vb under the controlled conditions and the mechanism for the particle trapping and its conditions are clarified.
2. When there is a static magnetic field, the VpxB acceleration scheme is formed and an efficient acceleration of electron beams are observed. In this case, a strong interacton also occurs at Vp Vb and the electron beams are accelerated 2.5-3 times of the initial injection energy.
We also constructed to demonstrate a new type electron linear accelerator which does not employ the plasma, but is based on the VpxB acceleration system. The experimental result shows more efficient and stable acceleration of electrons compared with a conventional linear accelerator.

Report

(3 results)
  • 1988 Annual Research Report   Final Research Report Summary
  • 1987 Annual Research Report
  • Research Products

    (21 results)

All Other

All Publications (21 results)

  • [Publications] 西田靖 他: Phys.Lett.A131. 437-440 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 西田靖: Laser and Particle Beams. (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 本沢忠夫: Phys.Fluids. 31. 1766-1772 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 本沢忠夫: Phys.Lett.A130. 367-370 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 本沢忠夫: J.Phys.Soc.Japan. 57. 3802-3808 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Y.Nishida et al.: "Resonance Absorption of Transmitted Ion Acoustic Soliton by the Space Charge Sheaths" Phys. Lett.A131. 437-440 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Y.Nishida: "Electron Linear Accelerator based on Cross Field Acceleration Principle" Laser and Particle Beams. (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] T.Honzawa: "An Experimental Study of Electron Distribution and Wave Potentials in Ion-Acoustic and Pseudoshocks" Phys. Fluids. 31. 1766-1772 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] T.Honzawa: "Deformation of the Background Plasma Ion Velocity Distribution by Ion-Beam Injection" Phys. Lett.A130. 367-370 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] T.Honzawa: "Controlled Excitation and Dispersion Relations of Nonlinear Multimode Waves in Ion-Beam-Plasma System" J. Phys. Soc. Japan. 57. 3802-3808 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 西田靖 他: Phys.Lett.A131. 437-440 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] 西田靖: Laser and Particle Beams. (1989)

    • Related Report
      1988 Annual Research Report
  • [Publications] 本沢忠夫: Phys.Fluids. 31. 1766-1772 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] 本沢忠夫: Phys.Lett.A130. 367-370 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] 本沢忠夫: J.Phys.Soc.Japan. 57. 3802-3808 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] Y.Nishida;N.Y.Sato: Phys.Rev.Lett. 59. 653-656 (1987)

    • Related Report
      1987 Annual Research Report
  • [Publications] Y.Nishida;N.Y.Sato;T.Nagasawa: IEEE Trans,Plasma Science. ps-15. 243-250 (1987)

    • Related Report
      1987 Annual Research Report
  • [Publications] Y.Nishida;H.Onihashi: Proc.6th Sympo.on Accelerator Science and Technology. 183-185 (1987)

    • Related Report
      1987 Annual Research Report
  • [Publications] C.W.Domier;Y.Nishida;N.C.Luhmann.Jr: Phys Rev.Lett.

    • Related Report
      1987 Annual Research Report
  • [Publications] T.Honzawa: Jap.J.Appl.Phys. 26. 594-597 (1987)

    • Related Report
      1987 Annual Research Report
  • [Publications] T.Honzawa: Phys.Fluids. 31. (1988)

    • Related Report
      1987 Annual Research Report

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Published: 1987-04-01   Modified: 2016-04-21  

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